import  mysql.connector         as      mariadb

from    config                  import  database
from	scripts			import	loggorilla

class inventory:

    def __init__(self):
        self.db_main	= mariadb.connect(**database.db_main)
        self.cursor	= self.db_main.cursor(dictionary=True)

    def list(self, params):
        APIADDR         = "/api/invlab/inventory/list"
        response        = {}
        self.cursor.execute("BEGIN;")
        try:
            ls = []
            self.cursor.execute("SELECT item.id AS item_id, item.name AS item_name, SUM(CASE WHEN inv.flow = 'sell' THEN price.value * inv.qty WHEN inv.flow = 'buy' THEN -price.value * inv.qty ELSE 0 END) AS profit, SUM(CASE WHEN inv.flow = 'buy' THEN inv.qty WHEN inv.flow = 'sell' THEN -inv.qty ELSE 0 END) AS current_qty FROM inventory inv LEFT JOIN item ON inv.item = item.id LEFT JOIN item_price price ON price.id = (SELECT sub.id FROM item_price sub WHERE sub.item = item.id AND sub.type = inv.flow AND sub.periods <= inv.when ORDER BY sub.periods DESC LIMIT 1) GROUP BY item.id, item.name ORDER BY item.name ASC;")
            l1 = self.cursor.fetchall()
            c1 = 0
            for d1 in l1:
                ls.append({
                    "item":{
                        "id"		: d1["item_id"		],
                        "name"		: d1["item_name"	]
                    },
                    "qty"	: int(d1["current_qty"	]),
                    "profit"	: int(d1["profit"	]),
                    "history"	: []
                })
                self.cursor.execute("SELECT inv.id, inv.flow, DATE_FORMAT(inv.when, '%Y-%m-%d %H:%i:%S') AS `when`, DATE_FORMAT(price.periods, '%Y-%m-%d %H:%i:%S') AS price_periods, price.value AS price_value, inv.qty, (price.value * inv.qty) AS `total` FROM inventory inv LEFT JOIN item ON inv.item = item.id LEFT JOIN item_price price ON price.id = (SELECT sub.id FROM item_price sub WHERE sub.item = item.id AND sub.type = inv.flow AND sub.periods <= inv.when ORDER BY sub.periods DESC LIMIT 1 ) WHERE item.id = %s ORDER BY inv.when DESC; ", ( d1["item_id"], ) )
                l2 = self.cursor.fetchall()
                c2 = 0
                for d2 in l2:
                    ls[c1]["history"].append({
                        "id"	: d2["id"	],
                        "flow"	: d2["flow"	],
                        "when"	: d2["when"	],
                        "price"	: {
                            "periods"	: d2["price_periods"	],
                            "value"	: d2["price_value"	]
                        },
                        "qty"	: d2["qty"	],
                        "total"	: d2["total"	]
                    })
                    c2+=2
                c1+=1
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"   ] = "success"
            response["desc"     ] = "data collected"
            response["data"     ] = ls
        except Exception as e:
            self.cursor.execute("ROLLBACK;")
            loggorilla.error(APIADDR, str(e) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"	] = "failed"
            response["desc"	] = "Internal Server Error. Please contact us if you still have an error."
        finally:
            self.cursor.execute("COMMIT;")
            self.cursor.close()
            self.db_main.close()
        return response

    def detail(self, params):
        APIADDR         = "/api/invlab/inventory/detail"
        response        = {}
        loggorilla.prcss(APIADDR, "Define parameters")
        id		= params["id"]
        self.cursor.execute("BEGIN;")
        try:
            self.cursor.execute("SELECT item.id AS item_id, item.name AS item_name, SUM(CASE WHEN inv.flow = 'sell' THEN price.value * inv.qty WHEN inv.flow = 'buy' THEN -price.value * inv.qty ELSE 0 END) AS profit, SUM(CASE WHEN inv.flow = 'buy' THEN inv.qty WHEN inv.flow = 'sell' THEN -inv.qty ELSE 0 END) AS current_qty FROM inventory inv LEFT JOIN item ON inv.item = item.id LEFT JOIN item_price price ON price.id = (SELECT sub.id FROM item_price sub WHERE sub.item = item.id AND sub.type = inv.flow AND sub.periods <= inv.when ORDER BY sub.periods DESC LIMIT 1) WHERE item.id = %s GROUP BY item.id, item.name ORDER BY item.name ASC;", ( id, ) )
            d1 = self.cursor.fetchone()
            data = {
                "item":{
                    "id"		: d1["item_id"		],
                    "name"		: d1["item_name"	]
                },
                "qty"		: int(d1["current_qty"	]),
                "profit"	: int(d1["profit"	]),
                "history"	: []
            }
            self.cursor.execute("SELECT inv.id, inv.flow, DATE_FORMAT(inv.when, '%Y-%m-%d %H:%i:%S') AS `when`, DATE_FORMAT(price.periods, '%Y-%m-%d %H:%i:%S') AS price_periods, price.value AS price_value, inv.qty, (price.value * inv.qty) AS `total` FROM inventory inv LEFT JOIN item ON inv.item = item.id LEFT JOIN item_price price ON price.id = (SELECT sub.id FROM item_price sub WHERE sub.item = item.id AND sub.type = inv.flow AND sub.periods <= inv.when ORDER BY sub.periods DESC LIMIT 1 ) WHERE item.id = %s ORDER BY inv.when DESC; ", ( d1["item_id"], ) )
            l2 = self.cursor.fetchall()
            c2 = 0
            for d2 in l2:
                data["history"].append({
                    "id"	: d2["id"	],
                    "flow"	: d2["flow"	],
                    "when"	: d2["when"	],
                    "price"	: {
                        "periods"	: d2["price_periods"	],
                        "value"		: d2["price_value"	]
                    },
                    "qty"	: d2["qty"	],
                    "total"	: d2["total"	]
                })
                c2+=2
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"   ] = "success"
            response["desc"     ] = "data collected"
            response["data"     ] = data
        except Exception as e:
            self.cursor.execute("ROLLBACK;")
            loggorilla.error(APIADDR, str(e) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"	] = "failed"
            response["desc"	] = "Internal Server Error. Please contact us if you still have an error."
        finally:
            self.cursor.execute("COMMIT;")
            self.cursor.close()
            self.db_main.close()
        return response

    def add(self, params):
        APIADDR         = "/api/invlab/inventory/add"
        response        = {}
        loggorilla.prcss(APIADDR, "Define parameters")
        item            = params["item"     ]
        flow            = params["flow"     ]
        when            = params["when"     ]
        qty		= params["qty"	    ]
        note            = params["note"     ]
        self.cursor.execute("BEGIN;")
        try:
            loggorilla.prcss(APIADDR, "Inserting")
            self.cursor.execute("INSERT INTO `inventory` VALUES (DEFAULT, %s, %s, %s, %s, %s) ;", (item, flow, when, qty, note) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"   ] = "success"
            response["desc"     ] = "data added"
        except Exception as e:
            self.cursor.execute("ROLLBACK;")
            loggorilla.error(APIADDR, str(e) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"	] = "failed"
            response["desc"		] = "Internal Server Error. Please contact us if you still have an error."
        finally:
            self.cursor.execute("COMMIT;")
            self.cursor.close()
            self.db_main.close()
        return response

    def edit(self, params):
        APIADDR		= "/api/invlab/inventory/edit"
        response	= {}
        loggorilla.prcss(APIADDR, "Define parameters")
        key		= params["id"       ]
        item            = params["item"     ]
        flow            = params["flow"     ]
        when            = params["when"     ]
        qty		= params["qty"	    ]
        note            = params["note"     ]
        self.cursor.execute("BEGIN;")
        try:
            loggorilla.prcss(APIADDR, "Updating")
            self.cursor.execute("UPDATE `inventory` SET `item` = %s, `flow` = %s, `when` = %s, `qty` = %s, `note` = %s WHERE `id` = %s ;", (item, flow, when, qty, note, key) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"   ] = "success"
            response["desc"     ] = "data change"
        except Exception as e:
            self.cursor.execute("ROLLBACK;")
            loggorilla.error(APIADDR, str(e) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"	] = "failed"
            response["desc"	] = "Internal Server Error. Please contact us if you still have an error."
        finally:
            self.cursor.execute("COMMIT;")
            self.cursor.close()
            self.db_main.close()
        return response

    def remove(self, params):
        APIADDR		= "/api/invlab/inventory/remove"
        response	= {}
        loggorilla.prcss(APIADDR, "Define parameters")
        key		= params["id"      ]
        self.cursor.execute("BEGIN;")
        try:
            loggorilla.prcss(APIADDR, "Deleting")
            self.cursor.execute("DELETE FROM `inventory` WHERE `id` = %s ;", (key,) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"	] = "success"
            response["desc"	] = "data removed"
        except Exception as e:
            self.cursor.execute("ROLLBACK;")
            loggorilla.error(APIADDR, str(e) )
            loggorilla.prcss(APIADDR, "Giving response")
            response["status"	] = "failed"
            response["desc"	] = "Internal Server Error. Please contact us if you still have an error."
        finally:
            self.cursor.execute("COMMIT;")
            self.cursor.close()
            self.db_main.close()
        return response